Effects of gibberellic acid on growth and photosynthetic pigments of Hibiscus sabdariffa L. under salt stress

2012 ◽  
Vol 11 (4) ◽  
Author(s):  
Hayssam M. Ali
Keyword(s):  
Salt Stress ◽  
Gibberellic Acid ◽  
Photosynthetic Pigments ◽  
Hibiscus Sabdariffa

scholarly journals The effect of salt stress on the germination of maize (Zea mays L.) seeds and photosynthetic pigments

2015 ◽  
Vol 105 (1) ◽  
pp. 85-94 ◽  
Author(s):  
Sali ALIU ◽  
Imer RUSINOVCI ◽  
Shukri FETAHU ◽  
Bekim GASHI ◽  
Emilija SIMEONOVSKA ◽  
...  
Keyword(s):  
Zea Mays ◽  
Salt Stress ◽  
Photosynthetic Pigments ◽  
Zea Mays L

Alleviation of salt stress using gibberellic acid in Chinese cabbage

2012 ◽  
Vol 60 (4) ◽  
pp. 345-355 ◽  
Author(s):  
M. Jamil ◽  
M. Ashraf ◽  
E. Rha
Keyword(s):  
Salt Stress ◽  
Gibberellic Acid ◽  
Chinese Cabbage ◽  
Germination Rate ◽  
Harmful Effect ◽  
Seed Priming ◽  
Nacl Stress ◽  
Growth And Yield ◽  
Distilled Water ◽  
Membrane Injury

Salinity reduces plant growth and yield by affecting morphological and physiological processes. To alleviate the harmful effects of salt stress various approaches involving plant hormones are used. In this study several parameters involving the measurement of cell membrane injury were used to observe whether stress tolerance could be enhanced in Chinese cabbage (B. oleracea capitata L. Chinensis group) by soaking the seeds for 10 h in distilled water (control), or in 100, 150 or 200 mg l−1 gibberellic acid (GA3). The NaCl concentrations were 0 (control), 50, 100 and 150 mM. Seed treated with GA3 showed increased water uptake and decreased electrolyte leakage as compared to that of distilled water-primed seeds even 24 h after soaking under control conditions. Seed priming with GA3 increased the final germination and the germination rate (1/t50, where t50 is the time to 50% germination) under salt stress conditions. Seed priming also alleviated the harmful effect of salt stress on cabbage in terms of fresh and dry weights. Leaf area was higher in plants raised from seeds primed with the higher GA3 concentrations as compared with those raised from seeds treated with distilled water under control conditions (without NaCl) or at 50 mM NaCl stress. The chlorophyll content increased with the NaCl concentration, especially in plants grown from seeds primed with GA3. Plants grown from GA3-primed seeds also suffered lower cellular injury both under control conditions and under NaCl stress.

scholarly journals Morpho-physiological and molecular responses of two Libyan bread wheat cultivars to plant growth regulators under salt stress

2020 ◽  
Vol 15 (3) ◽  
Author(s):  
El Hadi Hadia ◽  
Amor Slama ◽  
Leila Romdhane ◽  
Hatem Cheikh M’hamed ◽  
Ahmed Houssein Abodoma ◽  
...  
Keyword(s):  
Gene Expression ◽  
Salt Stress ◽  
Plant Growth ◽  
Gibberellic Acid ◽  
Plant Growth Regulators ◽  
Bread Wheat ◽  
Growth Regulators ◽  
Glycine Betaine ◽  
Growth Yield ◽  
Wheat Varieties

To study the effects of salt stress and plant growth regulators (kinetin, gibberellic acid, potassium) on growth, yield, glycine betaine content, phosphoenolpyruvate carboxylase (PEPC) and ribulose biphosphate carboxylase (RBC) gene expression of two Libyan bread wheat varieties, a factorial design of greenhouse experiment with three replications was conducted. Results revealed that salt stress significantly reduced plant growth and productivity of both varieties. Moreover, the addition of kinetin + potassium and gibberellic acid + potassium had improved the performance of the morpho-metric parameters of both genotypes under salt stress; but the performance was more effective for kinetin treatment than for gibberellic acid. At the biochemical level, the results showed that salt stress increased glycine betaine contents in both varieties with different proportions. This increase is more elevated in the presence of kinetin + potassium than the treatment with gibberellic acid+ potassium, which showed an almost similar result as in only salt stress. At the molecular level, the effects of salt stress and plant growth regulators on the PEPC and RBC gene expression showed that the increase was significantly higher for kinetin, gibberellic acid, and salt stress when compared to the control.

scholarly journals QUANTUM YIELD, PHOTOSYNTHETIC PIGMENTS AND BIOMASS OF MINIWATERMELON UNDER IRRIGATION STRATEGIES AND POTASSIUM1

2021 ◽  
Vol 34 (3) ◽  
pp. 659-669
Author(s):  
SAULO SOARES DA SILVA ◽  
GEOVANI SOARES DE LIMA ◽  
VERA LÚCIA ANTUNES DE LIMA ◽  
LAURIANE ALMEIDA DOS ANJOS SOARES ◽  
HANS RAJ GHEYI ◽  
...  
Keyword(s):  
Salt Stress ◽  
Quantum Yield ◽  
Photosynthetic Pigments ◽  
Saline Water ◽  
Block Design ◽  
Irrigation Management ◽  
Biomass Accumulation ◽  
Maturation Stage ◽  
Fruit Maturation ◽  
Maturation Stages

ABSTRACT This study was conducted with the objective of evaluating the quantum yield, photosynthetic pigments and biomass accumulation of mini watermelon cv. Sugar Baby, under strategies of irrigation with saline water and potassium fertilization. The experiment was conducted in a randomized block design, in a 8 × 3 factorial scheme, with three replicates, corresponding to eight strategies of irrigation with saline water applied at different phenological stages of the crop (control - irrigation with low-salinity water throughout the crop cycle, and salt stress in the vegetative, vegetative/flowering, flowering, flowering/fruiting, fruiting, fruiting/ fruit maturation and fruit maturation stage) and three potassium doses (50, 100 and 150% of the recommendation). The dose of 100% corresponded to 150 mg of K2O kg-1 of soil. Two levels of electrical conductivity of water were used: 0.8 and 4.0 dS m-1. Irrigation with water of 4.0 dS m-1 continuously in the vegetative and flowering stages increased the initial fluorescence and decreased the quantum efficiency of photosystem II of mini watermelon fertilized with 100 and 150% of K recommendation. Fertilization with 50% recommendation did not interfere in the fluorescence parameters of the mini watermelon, regardless of the irrigation management strategy. Chlorophyll a synthesis is inhibited by salt stress in the vegetative/flowering, flowering, flowering/fruiting, fruiting/maturation stages, as well as for total chlorophyll, except for the flowering stage. Application of 4.0 dS m-1 water in the flowering, fruiting/maturation and maturation stages promoted greater biomass accumulation in mini watermelon.

scholarly journals Salt stress effects on growth and photosynthetic pigments’ content in algoculture of Acutodesmus dimorphus (Chlorophyta)

Algologia ◽  
2017 ◽  
Vol 27 (3) ◽  
pp. 231-245
Author(s):  
K.O. Romanenko ◽  
◽  
P.O. Romanenko ◽  
L.M. Babenko ◽  
I.V. Kosakivska ◽  
...  
Keyword(s):  
Salt Stress ◽  
Photosynthetic Pigments ◽  
Stress Effects
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